"Earth has been overrun by an alien invading force. Your mission is to find and rescue a team of scientists captured and held deep in underground caverns. They alone know the secret of how to destroy the alien fleet. Bring them out alive and save the planet. By landing at the few remaining bases, your shields, fuel, etc. are refilled. If a landing bay is damaged you may not be able to land.
The gauges on the lower pane of the screen indicate the level of fuel, shields, bombs and photons that are left. Each ship destroyed is worth 1000 points and when you reach the bottom level of the caverns each ship is worth 2000 points. Watch the gauges so that you know when your ship needs refueling or new shields. Each scientist that is rescued is worth 10000 points."
The registered version of this game was included on the WayForward Technologies Windows Fun Pack. The shareware version was self published.